not to do、not doing、not do分别在什么情况下使用?

not to do、not doing、not do分别在什么情况下使用? be not do not do not be 分别在什么情况下使用 请问：learn to do 和learn doing 有什么区别?分别在什么情况下使用? why not +什么 doing?do? Why not 后面+doing 还是to do? prefer sb not to do? 还是doing? why not to do 还是why not doing prefer not to do 还是prefer not doing we'd better___it now A not to do B not do C not doing 填什么,为什 why not doing sth还是why not do sth还是why not to do sth why not do还是why not doing? 艾弗森 名言I do not to respect and fear anyone原话是在 什么情况 下说的 另外 这句